In this paper, the effect of ultrasonic impact on the macrostructure and strength of dissimilar titanium and aluminum alloy joints produced by friction stir welding has been investigated. The weld width, tool plunge depth, and interface complexity were chosen as criteria for macrostructure evaluation. It was found experimentally that the ultrasonic impact can both intensify stirring of materials and worsen them. In the selected range of modes, ultrasonic impact led to a decrease in the joint strengths. It was found that the interface complexity was inversely proportional to the heat input during welding in the joints that were made without ultrasonic impact. It was also found that the strength of joints correlates with the interface complexity.
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Eliseev, A.A., Ermakova, S.A. & Kolubaev, E.A. Effect of Ultrasonic Impact on the Macrostructure and Strength of Dissimilar Aluminum and Titanium Alloys Joints Produced by Friction Stir Welding. Russ Phys J 65, 2210–2215 (2023). https://doi.org/10.1007/s11182-023-02892-6
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DOI: https://doi.org/10.1007/s11182-023-02892-6